Fix private space icons disappearing from search state.

This is because during onBind() that the icon alpha should be set to 0 ONLY in the case
when animation + scroll is happening.

The repro cuj is this:
user has private space unlocked -> goes to toast and clicks qs tile -> onBind() happens
and animationScrolling = true -> icon alpha is now 0. Instead we should check getAnimate() && scrolling()
&& isStateTransitioning()

bug: 340836439
Test: manually -
before: https://drive.google.com/file/d/1WLZRPsz-hm1d3fVRNGXs_Ps_AcdJhkPs/view?usp=sharing
after: https://drive.google.com/file/d/1LidDKhx2ijOXmX_tcPAmng5P56WNPyyx/view?usp=sharing
Flag: ACONFIG com.android.launcher3.Flags.private_space_animation NEXTFOOD
Change-Id: I10b8ee5d8449acdb3d2c64e0e311f7dde89a464a